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Other Comprehensive Income (Loss) - Components of Other Comprehensive Income (loss) Pre-Tax and After-Tax (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Sep. 30, 2022 | Sep. 30, 2021
After-tax |  |  |  |  |  |  |  |
Other comprehensive income (loss) | $ (27,531) | $ (29,656) | $ (42,910) | $ (1,827) | $ 7,996 | $ (16,910) | $ (100,097) | $ (10,741)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent |  |  |  |  |  |  |  |
Pre-tax |  |  |  |  |  |  |  |
Unrealized holding gains (losses) arising during the period | (36,715) |  |  | (1,635) |  |  | (134,148) | (13,796)
Less: Reclassification adjustments for (gains) losses realized in net income (loss) | 210 |  |  | (690) |  |  | 1,423 | (243)
Other comprehensive income (loss) | (36,505) |  |  | (2,325) |  |  | (132,725) | (14,039)
Tax |  |  |  |  |  |  |  |
Unrealized holding gains (losses) arising during the period | (9,026) |  |  | (334) |  |  | (32,978) | (3,241)
Less: Reclassification adjustments for (gains) losses realized in net income (loss) | 52 |  |  | (164) |  |  | 350 | (57)
Other comprehensive income (loss) | (8,974) |  |  | (498) |  |  | (32,628) | (3,298)
After-tax |  |  |  |  |  |  |  |
Unrealized holding gains (losses) arising during the period | (27,689) |  |  | (1,301) |  |  | (101,170) | (10,555)
Less: Reclassification adjustments for (gains) losses realized in net income (loss) | 158 |  |  | (526) |  |  | 1,073 | (186)
Other comprehensive income (loss) | $ (27,531) |  |  | $ (1,827) |  |  | $ (100,097) | $ (10,741)

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